Minor doc updates throughout

Author: fhunleth

README.md

@@ -41,32 +41,39 @@ extension and if you're using `etcher`, get the `zip` file. Releases are named
 by the boards they support:
 
 * `bbb` - BeagleBone Black, BeagleBone Green, PocketBeagle, etc.
-* `grisp2` - GRiSP2 (Experimental)
+* `grisp2` - [GRiSP2](https://www.grisp.org/) (Experimental)
 * `rpi0` - Raspberry Pi Zero or Zero W
 * `rpi` - The original Raspberry Pi Model B
 * `rpi2` Raspberry Pi 2 Model B
 * `rpi3` - Raspberry Pi 3 Model B and Model B+
 * `rpi3a` - Raspberry Pi 3 Model A+ and Raspberry Pi Zero 2 W
 * `rpi4` - Raspberry Pi 4 Model B
 * `osd32mp1` - Octavo OSD32MP1-BRK
-* `npi_imx6ull` - Seeed Studio imx6ull (select MicroSD boot mode)
+* `npi_imx6ull` - Seeed Studio imx6ull (select the MicroSD boot mode switches)
 
-Once the download completes, you're ready to install the firmware on your device.
+Some of these are easier than others to use. If you have a choice, the Raspberry
+Pi Zero, Raspberry Pi 4 and BeagleBones are good ones to try first. These boards
+have a lot of functionality and connecting them to a network is a little easier
+than the others.
 
 ## Burning the Firmware for devices that boot from MicroSD
 
 These instructions will work for the Raspberry Pi, Beaglebones and other devices
 that either boot off MicroSD cards or can be configured to do so. If you're
 using a GRiSP 2, see the GRiSP 2 installation section.
 
-Navigate to the directory where you downloaded the firmware. We'll go through
-both `fwup` and `etcher` methods.
+Navigate to the directory where you downloaded the firmware. Either `fwup` or
+`etcher` can be used to burn the firmware.
 
 To be clear, this formats your SD card, and you will *lose all data on the SD
 card*. Make sure you're OK with that.
 
 ### `fwup`
 
+You'll need to install `fwup` if you don't have it. On Mac, run `brew install
+fwup`. For Linux and Windows, see the [fwup installation
+instructions](https://github.com/fwup-home/fwup#installing).
+
 ```console
 λ ~/fwup circuits_quickstart_rpi0.fw
 Use 15.84 GB memory card found at /dev/rdisk2? [y/N] y
@@ -86,7 +93,8 @@ the next section.
 
 ### `etcher`
 
-Start `etcher`, point it to the zip file, and follow the prompts:
+Start [`etcher`](https://www.balena.io/etcher/), point it to the zip file, and
+follow the prompts:
 
 ![etcher screenshot](assets/etcher.png)